Sphere of fire is the name given in Ptolemaic astronomy to the sphere intervening between, and separating, the Earth and the Moon. == Traditional concept == Building on Empedocles's vision of the world as a four-level cake of stacked fundamental elements - earth, water, air and fire - with fire at the top, Aristotle saw the sublunary world as surmounted by the sphere of fire.
Sphere of fire is the name given in Ptolemaic astronomy to the sphere intervening between, and separating, the Earth and the Moon. == Traditional concept == Building on Empedocles's vision of the world as a four-level cake of stacked fundamental elements - earth, water, air and fire - with fire at the top, Aristotle saw the sublunary world as surmounted by the sphere of fire.
Source: Wikipedia "Sphere of fire" · CC BY-SA 4.0
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